[1] Brigham & Womens Hosp, Div Cardiol, Boston, MA 02120 USA
[2] Hamilton Hlth Sci, Dept Med, Hamilton, ON, Canada
[3] McMaster Univ, Hamilton, ON, Canada
[4] Weis Ctr Res, Geisinger Clin, Danville, PA 17822 USA
[5] Mayo Clin, Rochester, MN USA
[6] VA Boston Hlth Syst, Div Cardiol, Boston, MA USA
[7] Univ Kentucky, Gill Heart Inst, Lexington, KY USA
[8] Univ Kentucky, Div Cardiovasc Med, Lexington, KY USA
[9] Duke Univ, Sch Med, Div Cardiol, Durham, NC USA
[10] Duke Univ, Sch Med, Div Hematol, Durham, NC USA
[11] Univ Florida, Div Cardiol, Coll Med Jacksonville, Jacksonville, FL USA